One day after Bernie Mac unexpectedly passed away, soul legend Isaac Hayes has also died. He collapsed near a treadmill, and although the cause of death is not known, it seems a safe assumption that it was probably a heart attack. Hayes was known not just for his music (which included the theme song for Shaft), but also his performances in Escape From New York, Stargate SG-1, and the cult classic Uncle Sam. He also provided the voice of Chef on South Park for a number of years, before leaving the show after it attacked scientology. It’s another unfortunate loss, but he will most certainly be remembered. Let’s just hope we don’t have to write a third obit later this week.